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Investments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Mar. 31, 2012
Available-for-sale Securities [Abstract]
Amortized Cost	$ 14,973	$ 14,026
Gross Unrealized Gains	339	309
Gross Unrealized Losses	(203)	133
Fair Value	11,148	10,184
Fair Value	15,109	14,202
U.S. Treasury and Government Agencies [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	1,662	1,371
Gross Unrealized Gains	12	11
Gross Unrealized Losses		(1)
Fair Value	1,674	1,381
Mortgage-backed securities [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	4,674	3,946
Gross Unrealized Gains	19	17
Gross Unrealized Losses	(72)	(48)
Fair Value	4,621	3,915
States and political subdivisions [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	1,179	1,186
Gross Unrealized Gains	27	26
Fair Value	1,206	1,212
Corporate debt securities [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	3,611	3,640
Gross Unrealized Gains	36	37
Gross Unrealized Losses		(1)
Fair Value	3,647	3,676
Marketable equity securities [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	3,847	3,883
Gross Unrealized Gains	245	218
Gross Unrealized Losses	(131)	(83)
Fair Value	$ 3,961	$ 4,018

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